Electronic fabric strength tester

Its characteristics are as follows: 1. It has a fixed-point alarm function. Users can set points within the full range to achieve traffic light conversion. 2. According to usage requirements, calibration can be carried out at a fixed point (such as 10Pa) by adjusting parameters and aligning with the standard table * to achieve *. 3. It has a beautiful appearance, easy adjustment of various parameters, low failure rate, and reliable performance, making it an excellent vacuum gauge for vacuum measurement and control in the refrigeration industry.

II Environmental conditions for use

1. Room temperature: 0~50 ℃

2. Relative humidity:<80%

III Main technical indicators

1. Measurement range: 0.01~999 (Pa)

2. Indication error: 1-999 (Pa)? 10 %

3. A set point that can cause traffic lights to switch.

4. 232 computer interface. (Optional)

5. Dimensions: 90? 90 ? 180 （mm）

6. Net weight of the instrument: 1.2 kg

7. Installation window: 91? 91 (mm) (height? Wide)

4 Instructions for Use

1. Connect the thermocouple gauge tube to the tested container and connect the gauge tube to the instrument with a cable.

2. Insert the instrument gauge socket, turn on the power, and the vacuum degree reading will be displayed. When it is greater than 999Pa, the instrument displays 9.9.9 When the pressure is less than 0.01Pa, the instrument displays 000.

3. Regulate the adjustment of current and voltage. This user does not need to make any changes, as the instrument has been adjusted before leaving the factory. The current is the nominal current of the gauge (mA), and the voltage is the voltage output of the gauge during measurement (mV). Press the "Select" button to turn on the "Current" light. If the value between 25.0-30.0 is displayed as mA, and if the value between 0.10-10.0 is displayed as mV, press the "Confirm" button to switch between current and voltage display values. 1 is the current, and 2 is the voltage. Numerical adjustment: After determining mA or mV, press the "▲" or "?" keys to adjust the numerical value. Press the 'Select' button to return the instrument to measurement mode. Please note that any adjustments will change the measurement error.

4. Set point adjustment. Press the 'Select' button to turn on the 'Set Point' light, and the left digit will flash, indicating that it is adjustable. Press the "?" key to make the flashing displacement. Press the "▲" key to cycle the numbers from 0 to 9. After adjustment, press the "OK" key to lock. Press the 'Select' button to return the instrument to measurement mode. When the vacuum value is greater than the set point, the red light will turn on. When the vacuum value is less than the set point, the green light will turn on

5. Calibration. Zero point and full-scale calibration are linear calibrations of sensors, which are calibrated and locked on a standard system at the factory and cannot be changed by users at will.

Zero point and full-scale calibration method: Connect the gauge tube to the vacuum standard system. Press and hold the ▲ key first, then turn on the power, and the instrument will enter calibration mode. Pump the vacuum standard system to<0.01Pa, press the "Select" button to turn on the "Zero" indicator light, press the "Confirm" button, and the instrument reading will be 000.

Adjust the vacuum standard system to 999Pa or nearby (the closer the better), press the "Select" button to turn on the "Full" indicator light, press the "Confirm" button, and the instrument reading will be 999. Press the 'Select' button to turn off the indicator light and return to the measurement state. After calibration is complete, turn off the power and lock the calibration. Turn on the power again and enter the measurement mode.

6. Troubleshooting:

When the instrument displays "-", it indicates that the vacuum gauge is not connected; Poor cable contact; Regulatory damage. Check if the regulation is damaged and use a multimeter to measure. There should be 10 between the four pins of the regulation? Left and right resistors.

If there is an error during adjustment, the instrument cannot measure normally, or if there is a program error due to electromagnetic interference, the program needs to be restored. Recovery program: Turn off the power, hold down the "Confirm" button, and then turn on the power again to restore the program.

7. The insurance tube is 1A.

8. The warranty period for this instrument is one year (excluding regulations).

9. RS232 communication

① Microcomputer 9P instrument 9P

Ｐ ２―――― Ｐ２

Ｐ ３―――― Ｐ３

Ｐ ５―――― Ｐ５

② Communication baud rate: 9600

Starting position: 1 position

Data bits: 8 bits

Parity bit: None

Stop position: 1 position

③ . PC sends the address of this instrument (factory set as 1, modifiable, range: 1-99), and can retrieve data from the instrument. The instrument sends back a total of 8 bytes of data.

The first byte is 255 (0xFF).

Second byte: Address of this instrument (factory set to 1, modifiable, range: 1-99).

Byte 3-6: Vacuum value, ASCII code.

7th byte: Status indication. Vacuum degree is less than the set value, 0x4C (L), and the green light on the front panel is on; The vacuum degree is greater than the set value, 0x48 (H), and the red light on the front panel is on

The 8th byte: checksum, the sum of the first 7 bytes.

Note: Regulatory connection method: straight pipe outer diameter 15.5mm, KF16, KF25 flange.